Paralysis

We are every moment conscious of internal power: while we feel, that, by the simple comand of our will, we can move the organs of our body, or direct the faculties of our mind - D Hume

Until one day, you can not instruct your legs to move.
Your lucky legs without polio have led you everywhere you wished, even into the problems that you were afraid of walking into. It is not that the legs themselves that have become heavy and pulled you to the ground. The communication channels have been snapped. The network in your body is now snags. No amount of the sensation inside your body will shock those muscles into action. In your mind, you try again to pump the power that you had from the time you thought.